Danny,

I am in the same boat as you as far as family time is concerned. I have three children at home and the youngest if five years old. So, the only way I can get exercise is to do it as part of my work-commute. I started with walking part of the way. Now, I choose to cycle all the way. Getting that daily exercise can be done.

Yet your mention of those high-speed country roads cannot be ignored. The danger is real. One should not cycle in conditions in which they do not feel confident.

But don't give up, there may be an option somewhere!
Don't forget the possibility of driving most of the way, then walking a couple of miles the rest.

Peter